Photon Echo Generated at the Transition 0-1 in Ytterbium
Vapor¹

N. N. Rubtsova^a, *, V. G. Gol’dort^a, V. N. Ishchenko^a, S. A. Kochubei^a,
E. B. Khvorostov^a, V. A. Reshetov^b, and I. V. Yevseyev^c

^a Institute of Semiconductor Physics of Siberian Branch of Russian Academy of Sciences,
pr. Akademika Lavrentyeva 13, Novosibirsk, 630090 Russia

^b Togliatti State University, Belorusskaya ul., 14, Togliatti, 445667 Russia

^c Moscow State Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409 Russia

*e-mail: rubtsova@isp.nsc.ru

Received October 26, 2011; published online September 3, 2012

Abstract—Photon echo generated at the inter-combination transition (6s²) ¹S₀ – (6s6p) ³P₁ of ¹⁷⁴Yb was inves-
tigated for pure ytterbium vapor and for its mixtures with atomic buffers. In pure ytterbium vapor, the polariza-
tion of photon echoes at this 0-1 transition coincides with the polarization of the second exciting pulse for all
combinations of linear and circular polarizations of exciting radiation pulses. Photon echo does not appear
either for linear orthogonal or for opposite circular polarizations of exciting pulses in pure ytterbium. In mix-
tures of ytterbium with atomic buffers (Kr, Xe), collision induced photon echo arises only for exciting pulses
of linear orthogonal polarizations, its power is essentially less than that of the ordinary echo generated by pulses
with parallel polarizations in the same mixture. Polarization of collision induced echo is linear, and it coincides
with polarization of the first exciting pulse. Experimental results agree with calculations, and they confirm that
the collision induced photon echo at this transition arises exclusively due to anisotropy of depolarizing colli-
sions.

DOI: 10.1134/S1054660X12100210

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